Koji Sayama

5.6k total citations
137 papers, 4.2k citations indexed

About

Koji Sayama is a scholar working on Molecular Biology, Immunology and Dermatology. According to data from OpenAlex, Koji Sayama has authored 137 papers receiving a total of 4.2k indexed citations (citations by other indexed papers that have themselves been cited), including 38 papers in Molecular Biology, 38 papers in Immunology and 34 papers in Dermatology. Recurrent topics in Koji Sayama's work include Dermatology and Skin Diseases (21 papers), Autoimmune Bullous Skin Diseases (17 papers) and Antimicrobial Peptides and Activities (14 papers). Koji Sayama is often cited by papers focused on Dermatology and Skin Diseases (21 papers), Autoimmune Bullous Skin Diseases (17 papers) and Antimicrobial Peptides and Activities (14 papers). Koji Sayama collaborates with scholars based in Japan, United States and Switzerland. Koji Sayama's co-authors include Koji Hashimoto, Yuji Shirakata, Yasushi Hanakawa, Sho Tokumaru, Mikiko Tohyama, Xiuju Dai, Lüjun Yang, Kenshi Yamasaki, Yoko Yahata and Masamoto Murakami and has published in prestigious journals such as Journal of Biological Chemistry, The Journal of Experimental Medicine and SHILAP Revista de lepidopterología.

In The Last Decade

Koji Sayama

129 papers receiving 4.2k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Koji Sayama Japan 35 1.4k 1.3k 852 850 641 137 4.2k
Regine Gläser Germany 35 1.4k 1.0× 1.4k 1.1× 1.1k 1.3× 1.4k 1.6× 396 0.6× 95 4.3k
Yuji Shirakata Japan 36 1.3k 0.9× 1.1k 0.8× 315 0.4× 830 1.0× 678 1.1× 96 4.7k
Yasushi Hanakawa Japan 37 1.6k 1.2× 1.2k 0.9× 326 0.4× 576 0.7× 951 1.5× 76 4.4k
Andor Pivarcsi Sweden 43 2.7k 1.9× 2.2k 1.6× 451 0.5× 2.0k 2.3× 806 1.3× 76 7.0k
Kenshi Yamasaki Japan 42 2.0k 1.4× 2.0k 1.5× 1.1k 1.3× 2.8k 3.3× 482 0.8× 156 7.1k
Patrick L.J.M. Zeeuwen Netherlands 40 1.4k 1.0× 1.4k 1.1× 480 0.6× 1.9k 2.2× 344 0.5× 101 4.9k
Rosalba Salcedo United States 28 2.3k 1.6× 2.5k 1.9× 603 0.7× 545 0.6× 1.8k 2.7× 39 5.6k
Shigaku Ikeda Japan 42 1.3k 1.0× 1.5k 1.2× 631 0.7× 2.2k 2.6× 186 0.3× 237 5.7k
R. Gillitzer Germany 31 983 0.7× 1.9k 1.4× 145 0.2× 515 0.6× 1.0k 1.6× 80 4.3k
Masamoto Murakami Japan 29 772 0.5× 1.4k 1.0× 1.2k 1.4× 1.3k 1.6× 165 0.3× 79 3.5k

Countries citing papers authored by Koji Sayama

Since Specialization
Citations

This map shows the geographic impact of Koji Sayama's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Koji Sayama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Koji Sayama more than expected).

Fields of papers citing papers by Koji Sayama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Koji Sayama. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Koji Sayama. The network helps show where Koji Sayama may publish in the future.

Co-authorship network of co-authors of Koji Sayama

This figure shows the co-authorship network connecting the top 25 collaborators of Koji Sayama. A scholar is included among the top collaborators of Koji Sayama based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Koji Sayama. Koji Sayama is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Dai, Xiuju, Ken Shiraishi, Jun Muto, et al.. (2023). Nuclear IL-33 Plays an Important Role in EGFR-Mediated Keratinocyte Migration by Regulating the Activation of Signal Transducer and Activator of Transcription 3 and NF-κB. SHILAP Revista de lepidopterología. 3(4). 100205–100205. 6 indexed citations
2.
Tomimatsu, Kosuke, Dóra Bihary, Ioana Olan, et al.. (2021). Locus-specific induction of gene expression from heterochromatin loci during cellular senescence. Nature Aging. 2(1). 31–45. 18 indexed citations
3.
Shiraishi, Ken, et al.. (2021). Case of pemphigoid vegetans with autoantibodies against the BP180 C‐terminal domain and BP230 antigen. The Journal of Dermatology. 48(8). 1286–1290. 4 indexed citations
4.
Yoshida, Satoshi, Ken Shiraishi, Hideki Mori, et al.. (2021). Lichen planus pemphigoides with antibodies against the BP180 C‐terminal domain induced by pembrolizumab in a melanoma patient. The Journal of Dermatology. 48(9). e449–e451. 5 indexed citations
5.
Okada, Naoto, Hitoshi Kawazoe, Kenshi Takechi, et al.. (2018). Association Between Immune-Related Adverse Events and Clinical Efficacy in Patients with Melanoma Treated With Nivolumab: A Multicenter Retrospective Study. Clinical Therapeutics. 41(1). 59–67. 85 indexed citations
6.
Tohyama, Mikiko, et al.. (2017). Case of thymoma‐associated cutaneous graft‐versus‐host disease‐like disease successfully improved by narrowband ultraviolet B phototherapy. The Journal of Dermatology. 45(4). 479–482. 5 indexed citations
7.
Murakami, Masamoto, et al.. (2015). Cefcapene Pivoxil Hydrochloride Is a Potentially New Treatment for Palmoplantar Pustulosis with Pustulotic Arthro-Osteitis. Dermatology. 231(4). 304–311. 12 indexed citations
8.
9.
Dai, Xiuju, Koji Sayama, Mikiko Tohyama, et al.. (2011). Mite allergen is a danger signal for the skin via activation of inflammasome in keratinocytes. Journal of Allergy and Clinical Immunology. 127(3). 806–814.e4. 140 indexed citations
10.
Shirakata, Yuji, Shinji Murakami, Mikiko Tohyama, et al.. (2009). Successful Treatment of Severe Intractable Pemphigus Vulgaris with High-dose Intravenous Immunoglobulin. The Nishinihon Journal of Dermatology. 71(6). 561–565.
11.
Dai, Xiuju, Koji Sayama, Yuji Shirakata, et al.. (2008). PPARγ is an important transcription factor in 1α,25-dihydroxyvitamin D3-induced involucrin expression. Journal of Dermatological Science. 50(1). 53–60. 13 indexed citations
12.
Ouhara, Kazuhisa, Hitoshi Komatsuzawa, Toshihisa Kawai, et al.. (2008). Increased resistance to cationic antimicrobial peptide LL-37 in methicillin-resistant strains of Staphylococcus aureus. Journal of Antimicrobial Chemotherapy. 61(6). 1266–1269. 64 indexed citations
13.
Nagai, Hiroshi, Sho Tokumaru, Koji Sayama, et al.. (2007). Suppressor of cytokine signaling 3 negative regulation of signal transducer and activator of transcription 3 in platelet‐derived growth factor‐induced fibroblast migration. The Journal of Dermatology. 34(8). 523–530. 8 indexed citations
14.
Tokumaru, Sho, Koji Sayama, Yuji Shirakata, et al.. (2005). Induction of Keratinocyte Migration via Transactivation of the Epidermal Growth Factor Receptor by the Antimicrobial Peptide LL-37. The Journal of Immunology. 175(7). 4662–4668. 284 indexed citations
15.
16.
Tohyama, Mikiko, Kenshi Yamasaki, Yuji Shirakata, et al.. (2003). Lack of evidence for TARC/CCL17 production by normal human keratinocytes in vitro. Journal of Dermatological Science. 31(1). 37–42. 33 indexed citations
17.
Tohyama, Mikiko, et al.. (1998). Porokeratosis in Immunosuppressed Patients: A report of Two Cases.. The Nishinihon Journal of Dermatology. 60(1). 23–26.
18.
Sayama, Koji, Satoshi Shiraishi, & Yukio Miki. (1991). Characterization of homologous restriction factor (HRF20) in human skin and leucocytes. Journal of Dermatological Science. 2(3). 236–236. 1 indexed citations
19.
Sayama, Koji, Satoshi Shiraishi, Yuji Shirakata, et al.. (1991). Expression and Characterization of Membrane Co-Factor Protein (MCP) in Human Skin. Journal of Investigative Dermatology. 97(4). 722–724. 14 indexed citations
20.
Sugawara, Shirō, et al.. (1990). Transgalactosylation Products from Melibose by theα-Galactosidase ofAbsidia corymbifera. Agricultural and Biological Chemistry. 54(1). 211–213. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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